Synergy between Ceria Oxygen Vacancies and Cu Nanoparticles Facilitates the Catalytic Conversion of CO2 to CO under Mild Conditions

By Sheng-Chiang Yang, S. Pang, Taylor P. Sulmonetti, Wei‐Nien Su, Jyhfu Lee, B. Hwang, Christopher W. Jones. ACS Catalysis, 2018

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The performance of supported metal catalysts can depend on many factors, including metal particle size and dispersion and metal–support interactions, and differentiation of these effects is challenging because of their interwoven relationship. Copper/ceria catalysts are well-known redox catalysts studied in the conversion of CO and CO2 via oxidation and/or reduction pathways. The redox behaviors of each species, Cu-CuO and CeOx-CeO2, are often suggested to be interlinked, allowing ceria-supported copper domains to outperform copper species on other, nonredox active supports. In this work, the catalytic activity of nanosized Cu supported on either cerium oxide or mesoporous silica is explored using samples where the Cu weight loading, particle size, and dispersion of Cu are held constant to highlight the impact of the two supports on catalytic performance without additional influencing factors. The Cu/CeO2 catalysts are synthesized via a space-confined method to limit the growth of CeO2 particles and to ac...

Subfields: Catalysis, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/7ccd48e3c4a7af440f12297a11037d807435938a